BOTANY

Detailed explanation-1: -Hollow bones are also called pneumatized bones, meaning they’re filled with space for air. It is thought that this structure helps with oxygen intake during flight. Air sacs are attached to the hollow areas in a bird’s bones.

Detailed explanation-2: -Structural adaptations are how the animal’s body functions or looks on the outside. Body parts (like feet and ears) and body coverings (like fur and scales) are structural adaptations. Blanding’s Turtles and other species of turtles have a structural adaptation that is very easy to see-their shells.